Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate this
equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
This equipment complies with FCC RF radiation exposure limits set forth for an
uncontrolled environment. To maintain compliance with FCC RF exposure
compliance requirements, please avoid direct contact to the transmitting antenna
during transmitting.
Version 1.00 JANUARY 2022
911 Mariner St., Brea, CA 92821
PH: 714.257.0300 FAX: 714.257.0600
TOLL FREE: 800.666.2654
WWW.PRYME.COM
PRYMEMAX™ BTH-300-MAX
Wireless Microphone Kit
PRYMEMAX BTH-300-MAX
Made in Taiwan
KIT 1 SHOWN
PRYME® PRYMEBLU®, and PRYMEMAX™ are trademarks owned by
PRYME Radio Products, Brea CA.
All other product or service names are the property of their respective owners.
© 2022 PRYME Radio Products, Brea CA. All Rights Reserved
CHARGING THE BTH-300-MAX LAPEL MICROPHONE
The PRYMEMAX BTH-300-MAX lapel microphone has an internal Lithium Ion rechargeable battery pack
which must be charged prior to operation. A fully charged battery will provide approximately 10 hours
(or more) of operation before needing to be recharged. However, operating time can vary depending
on usage and the condition of the battery pack. Recharge the battery regularly.
The alligator-type clip secures
user’s clothing during use.
The clip can be rotated to
allow the mic to be better
status of the device. For
This micro-USB jack is used to connect the supplied charge
cable to the BTH-300-MAX in order to recharge the device’s
internal lithium-ion battery pack.
These buttons can be used to set the volume level of the
earphone connected to the BTH-300-MAX’s Earphone/Accessory
earphone, this microphone
picks up the user’s voice audio
to send over- the-air. When an
internal microphone is muted.
Any standard 3.5 mm stereo listen-only earphone can
be plugged into this jack. Received calls will be heard over the
earphone. This jack can also be used with a 3.5 mm 4-conductor
(Apple iPhone compatible) audio accessory that contains both
an earphone and a microphone such as Apple part numbers
ME186LL/A, or MD827LL/A. (Not included.) When used with such
an accessory, received calls can be heard over the accessory
earphones and transmit audio will be taken from the accessory
Pressing this button for one second turns the PRYMEMAX
BTH-300-MAX lapel microphone on or off. This button is
also used to place the lapel microphone in pairing mode
so that it can be connected wirelessly to a two-way radio
To charge the PRYMEMAX BTH-300-MAX lapel microphone:
1. Ensure the PRYMEMAX Lapel Microphone is turned off using the Power Button.
2. Plug the supplied wall charger into a standard 120 volt AC outlet.
3. Plug the charge cable into the AC wall charger and then into the charge jack on the side of the lapel
microphone. You will need to remove the protective rubber cover that is inserted into the charge jack.
(To prevent dust and moisture from damaging your lapel microphone, always ensure this cover is in
place when you are not charging the lapel mic.)
4. Once the charging process has begun, the LED indicator on the back of the PRYMEMAX Lapel
Microphone will show a continuous red light. When the battery is done charging, the LED light will
5. Typical charge time is approximately 4 hours. Actual charge time will vary depending on several
factors including the battery’s charge state, condition, and age.
6. Disconnect the charger from the lapel mic when charging is completed.
- Use only the wall charger supplied by the
manufacturer. Do not use any other charger.
- Do not use a wall charger that appears
to be damaged. (Example: frayed wires,
melted plastic, etc.) Contact PRYME to
get a new manufacturer-approved
- Do not tamper with or modify the
PRYMEMAX BTH-300-MAX lapel microphone or charger.
- Always turn the power switch to the off position
when charging the PRYMEMAX Lapel Microphone.
P-CBL-BT-USB charger cable and P-CHA-BT-USB
wall charger included with BTH-300-MAX.
CONNECTING AN AUDIO ACCESSORY TO THE BTH-300-MAX LAPEL MICRO-
In order to be able to hear incoming signals received by the
cellphone, the PRYMEMAX BTH-300-MAX lapel microphone
must be used with a wired audio accessory that includes
an earphone. A PRYME listen-only earphone or a different
audio accessory may be included with this kit.
Many different styles of optional wired audio
accessories are available.
To connect an audio accessory to the BTH-300-MAX lapel microphone:
1. Plug the audio accessory into the 3.5 mm audio jack located on the top of the PRYMEMAX
BTH-300-MAX lapel microphone. Make sure that the connector on the audio accessory is pushed all the
way into the jack on the lapel microphone.
2. You can adjust the volume of received signals by using the Volume Up and Volume Down buttons on
the lapel microphone or by adjusting the volume setting on the cellphone.
Optional Audio Accessories:
Although the BTH-300-MAX KIT 1 includes a PRYME ear bud-style earphone, it is possible to use a
different audio accessory, if you wish. The 3.5 mm audio jack on the lapel mic will accept any stereo
earphone with a 3.5 mm audio plug. You can also use any 3.5 mm 4-conductor (Apple iPhone
compatible) audio accessory that includes both an earphone and a microphone, such as Apple part
numbers ME186LL/A, or MD827LL/A (not included). If the audio accessory has a built-in microphone,
transmit audio will be taken from the accessory microphone.
PRYME makes a variety of listen-only earphones and accessory microphones in different styles that
will work with the BTH-300-MAX:
Bullet Transducer Acoustic Tube Earphone
Boom Mic Headset with D-Ring Earphone
Throat Mic Headset with Acoustic Tube Earphone
Motorcycle Helmet Boom Mic Kit
For use with PRYMEBLU Wireless adapters; BK, Icom,
and Kenwood two-way radios with built-in BT connectivity;
and for PTT Over-Cellular apps such as ES Chat, Wave
Communicator, and Zello on IOS and Android smart phones,
